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A framework for physically consistent storylines of UK future mean sea level rise

Author

Listed:
  • Matthew D. Palmer

    (Met Office Hadley Centre
    University of Bristol)

  • Benjamin J. Harrison

    (Met Office Hadley Centre)

  • Jonathan M. Gregory

    (Met Office Hadley Centre
    University of Reading)

  • Helene T. Hewitt

    (Met Office Hadley Centre)

  • Jason A. Lowe

    (Met Office Hadley Centre
    University of Leeds)

  • Jennifer H. Weeks

    (Met Office Hadley Centre)

Abstract

We present a framework for developing storylines of UK sea level rise to aid risk communication and coastal adaptation planning. Our approach builds on the UK national climate projections (UKCP18) and maintains the same physically consistent methods that preserve component correlations and traceability between global mean sea level (GMSL) and local relative sea level (RSL). Five example storylines are presented that represent singular trajectories of future sea level rise drawn from the underlying large Monte Carlo simulations. The first three storylines span the total range of the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6) likely range GMSL projections across the SSP1-2.6 and SSP5-8.5 scenarios. The final two storylines are based upon recent high-end storylines of GMSL presented in AR6 and the recent literature. Our results suggest that even the most optimistic sea level rise outcomes for the UK will require adaptation of up to 1 m of sea level rise for large sections of coastline by 2300. For the storyline most consistent with current international greenhouse gas emissions pledges and a moderate sea level rise response, UK capital cities will experience between about 1 and 2 m of sea level rise by 2300, with continued rise beyond 2300. The storyline based on the upper end of the AR6 likely range sea level projections yields much larger values for UK capital cities that range between about 3 and 4 m at 2300. The two high-end scenarios, which are based on a recent study that showed accelerated sea level rise associated with ice sheet instability feedbacks, lead to sea level rise for UK capital cities at 2300 that range between about 8 m and 17 m. These magnitudes of rise would pose enormous challenges for UK coastal communities and are likely to be beyond the limits of adaptation at some locations.

Suggested Citation

  • Matthew D. Palmer & Benjamin J. Harrison & Jonathan M. Gregory & Helene T. Hewitt & Jason A. Lowe & Jennifer H. Weeks, 2024. "A framework for physically consistent storylines of UK future mean sea level rise," Climatic Change, Springer, vol. 177(7), pages 1-24, July.
  • Handle: RePEc:spr:climat:v:177:y:2024:i:7:d:10.1007_s10584-024-03734-1
    DOI: 10.1007/s10584-024-03734-1
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    References listed on IDEAS

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    1. Robert M. DeConto & David Pollard, 2016. "Contribution of Antarctica to past and future sea-level rise," Nature, Nature, vol. 531(7596), pages 591-597, March.
    2. Caroline Katsman & A. Sterl & J. Beersma & H. Brink & J. Church & W. Hazeleger & R. Kopp & D. Kroon & J. Kwadijk & R. Lammersen & J. Lowe & M. Oppenheimer & H. Plag & J. Ridley & H. Storch & D. Vaugha, 2011. "Exploring high-end scenarios for local sea level rise to develop flood protection strategies for a low-lying delta—the Netherlands as an example," Climatic Change, Springer, vol. 109(3), pages 617-645, December.
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